Harry Styles has introduced Caroline Flack to his mother.

The relationship between the One Direction heartthrob and the 'Xtra Factor' presenter has reportedly gotten so serious despite their 15-year age-gap that Harry invited Caroline to his home in Cheshire to meet his mother Anne and step-father Robin Cox.

A source told the Sunday Mirror newspaper: "Caroline and Harry are a full-on couple now. Things are getting serious pretty quickly and they're in love.

"At first it was just a fling, but now they're looking at a future together.

"Caroline seemed to make a great impression with Harry's mum and it was mission accomplished."

Caroline's 'Xtra Factor' co-presenter Olly Murs recently revealed the romance between 17-year-old Harry and Caroline, 32, is going from strength to strength.

He said: "It's funny. Every girl in the country wants to kiss Harry - and I'm sure there are lots of boys who want to kiss him too.

"Caroline's very lucky and I think he's happy. Harry really does like Caroline - of course he does - she's absolutely gorgeous."